Cool pack



FIG. 1 is a top perspective view of the cool pack;

FIG. 2 is a bottom perspective view of the cool pack;

FIG. 3 is a top plan view of the cool pack;

FIG. 4 is a side elevational view of the cool pack; and

FIG. 5 is a front elevational view of the cool pack; and,

FIG. 6 is a bottom plan view of the cool pack. 

The ornamental design for a cool pack, as shown and described. 